This standard specifies the type, basic parameters and dimensions, technical requirements, test methods, inspection rules, marking, packaging and quality assurance period of brushed three-phase synchronous generators driven by reciprocating internal combustion engines (hereinafter referred to as generators). This standard applies to brushed three-phase synchronous generators with a rated frequency of 50 Hz driven by reciprocating internal combustion engines JB/T 8981-1999 Technical conditions for brushed three-phase synchronous generators (frame size 132-400) JB/T8981-1999 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T8981
1999-08-06
(132~400)
2000-01-01
Wa Xian Ji Dong
JB/T8981
This standard is based on GBT755 Rotating Electric Machines—Design and Performance" [d11EC60034—11996] 1-GB/T4772.1 Rotating electrical machine dimensions and output power levels [dIEC60072-1 (1991)]: IEC60034-22 (1996) (for AC generators for reciprocating internal combustion engines).
Compared with the T2 series generators, this standard expands the power level and speed range, and increases the insulation level types. The A section of this standard is a reminder of the negative section
This standard Proposed and coordinated by the National Technical Committee for Standardization of Rotating Electrical Machines. This standard was drafted by the Shanghai Institute of Electrical Materials. The drafting units of this standard are: Lanzhou Electric Motor Group Co., Ltd., Shanghai Gexin Electric Motor Factory, Chuangdong Electric Motor Factory, Fuzhou Power Generation Equipment Factory, Jiangxi Sanbo Electric Motor Factory, Xinjiang Chulong Group Special Electric Motor Company, Yintuo Electric Motor Factory, Linhai Electric Motor Factory, Gaofa Electromechanical Manufacturing Company, Mingyun Kaidian Equipment Co., Ltd., Luerbin Second Electric Motor Factory, Jihua Electric Motor Group Co., Ltd., Zhengzhou Power Generation Equipment Factory. The main drafters of this standard are: Ni Wenyi
Ji Jia Kui Lu Wa Yi
Zhang Xie Jue
(Cotton Hub 132~400)
JB/T89811999
This standard specifies the type, basic requirements and dimensions, technical requirements, and test methods of three-phase synchronous generators (hereinafter referred to as generators) driven by reciprocating internal combustion engines. Fast, inspection rules and marking, packaging and quality assurance period. This standard applies to three-phase synchronous generators with a predetermined frequency of 50h driven by reciprocating internal boosters. Note: Fortunately, the standard is available for generators with a rated frequency of 60h. 2 Referenced standards
The provisions contained in the following standards constitute the text of this standard through reference in this standard. At the time of publication of the standard, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB191-1990
GB/T755www.bzxz.net
GB/T9971981
GB/T1029—1993
GB/T1993—[993
GB/T28291987
GB/T4772.1-
GB482419 96
Packaging, storage and transportation pictorial symbols
Energy-saving motors - ratings and performance (id[EC60034-1:1996) Motor structure and military type code (e9vEC60034-7:1972) Three-phase synchronous motor test square
Cooling method for three-phase synchronous motors (e9veC60034-6:1991) Periodic inspection counting sampling procedure and sampling table (applicable to the inspection of production process stability) Motor size and output power level (oil[EC60072-1:1991) Industrial, scientific and medical (ISM) radiated equipment - Measurement methods and limits of electrical interference characteristics (neqCISPR11:1990)
GB/T4942.1-1985 Motor housing protection classification (cqvEC60034-5:1981) GB10068-
GB 10069—1988
Mechanical vibration of motors with a center height of 56 mm or more - Measurement, evaluation and limits of vibration (idt [EC60034—14:1996)
Determination method and limits of noise of rotating electrical machines (negIEC600349:1972) GB/T10585—1989Basic technical requirements for excitation systems of small and medium-sized synchronous motorsTechnical requirements for tropical energy-saving motors
GB/T12351-1990
GB/T1 2665-1990
Requirements for damp heat test of motors under normal environmental conditions GB/T14048.1—1993 General rules for low voltage switchgear and controlgear GB14711—1993
GB/T155481995
General requirements for safety of small and medium-sized power conversion
Technical conditions for three-phase synchronous generators driven by reciprocating internal combustion engines 1999-08-06
2000-01-01
JB/T 5810--1991
JB/T581I—1991
JB/T89811999
Motor pole coil and field winding insulation test standard AC low voltage motor type B group voltage peak test standard B low voltage motor unit insulation test method JB/T9615.2-—1999 AC low voltage motor scattered winding turn-to-turn insulation test limit 3 types, basic parameters and dimensions
3.1 The external protection level of the generator is IP11, 1P21, IP22, IP23 (see GB/T4942.1). 3.2 The generator is selected as 1C01GB1993) 3.3 The structural installation type of the generator is IMB3, IMB9, IMB15, IMB34, IMB35 (the convex and inner and outer stoppers are all OK, and the base can also be made into a flanged end with LMB5/IMB20, IMB14/IMB20 installation type (see GB/T997) 3.4 The generator rating is a continuous rating based on the continuous working system (S1). 3.5 The rated frequency of the generator is 50Hz.
36 The rated voltage of the generator is 400V. The armature cable group is a star connection with a lead wire at the neutral point. 3.7
The rated power of the generator is 0.8 (the rated power of the lagging generator is specified in the table! The unit can be kV A is represented by KW. Table! Rated power of generator
Note: Beijing prefers to use the ones without brackets
39 The correspondence between the frame number of the generator and the power and speed is stipulated by the American electrical enterprise standard. 1875)
The frame numbers of the generator are 137.160, 180, 200, 225, 250, 280, 315.355 and 40025
(16875)
3.10 The structural type, installation dimensions and tolerances of the generator are stipulated by the enterprise standard and shall comply with the provisions of GB/T4772.130
For the TMB and IMB34 types of Class B continuous generators, the installation dimensions and tolerances shall preferably adopt the provisions of Table 2 (Figure 1, Figure 21)
3. 11 The dimensions and tolerances of the auxiliary shaft extension key of the generator shall comply with the provisions of Table 3. 2 The installation dimensions and tolerances of the auxiliary shaft extension key of the generator shall comply with the provisions of Table 3. 2 The dimensions and tolerances of the auxiliary shaft extension key of the generator shall comply with the provisions of Table 3. The radial runout of the generator shaft extension shall not exceed the provisions of Table 4. Basic dimensions Table 4 Radial runout of the generator shaft extension The correct diameter of the shaft extension shall not exceed the provisions of Table 4. Limit deviation
The radial runout of the generator flange stop to the motor axis and the surface runout of the flange mounting surface to the motor axis shall not exceed the provisions of Table 53.13
.
Special 5 Radial runout of the generator flange stop and the flange mounting surface stop diameter
Limit of radial and surface runout
4 Technical requirements
The generator shall meet the requirements of this standard and be manufactured in accordance with the drawings and technical documents approved by the prescribed procedures. 350
4.2 Under the following sea level and ambient air temperature and ambient air relative humidity conditions, the generator can operate at rated speed 4.2.1 The sea level shall not exceed 1000m
4.2.2 The ambient air temperature varies with the seasons and shall not exceed 40℃. mm
: Electric locomotive manufacturing point sound technology over meter! 4.2.3 The minimum ambient temperature of the room should be -15℃, which can be -23℃ or 40℃ as required. 4.2.4 The monthly average relative humidity of the operating location is 90%, and the monthly average low temperature is not higher than 25℃. 4.3 The generator can be made to operate at an ambient air temperature of 50℃ with rated load as required. Its voltage regulation rate must still comply with the provisions of this standard. Other items that are affected by the increase of the ambient temperature to 50℃ may not be evaluated according to this standard.4 The generator can be made into a wet-type if necessary. In addition to meeting the requirements of this standard, the generator shall also comply with the provisions of GB12351. 4.5 The voltage and frequency changes during the operation of the generator shall comply with the provisions of GB/T755. 4.6 The generator and its dynamic magnetic system shall be able to control the excitation. The dynamic magnetic system of the generator shall be equipped with a voltage setting device, which can be placed on the distribution board. When the generator is no-load, the upper limit voltage (Uap) setting range Uap and the lower limit voltage (Up) setting range Uspo should both be no less than 4
JB/T8981
The upper limit voltage setting range of the generator is 4U and the lower limit voltage setting range is calculated using the formula (1 formula 2) UR-UMx100%-
Where: Ua——upper limit setting voltage, V
USDO lower limit setting voltage, V
U Generator rated voltage: V
Us10-UM×100%
When the generator does not need to be started during operation and does not require voltage setting or the user has other requirements, the voltage setting range can be negotiated separately. (2)
4.8 When the generator changes from no-load to rated load, the voltage should be able to be maintained within the range of (16U, which is the steady-state voltage regulation rate of the generator, divided into four levels: G, GG, G4 (see Table 68t calculated according to formula (3): 100
Where: UU is the maximum and minimum values ​​of the generator terminal voltage (effective value) when the load changes between full load and no-load, calculated according to the maximum and minimum values ​​of the three-phase average value, V steady-state voltage regulation rate is determined under the following conditions:) The load power changes from zero to rated power, and the three-phase current is flat: 6) The power efficiency is 0.8 (lagging)
e) The speed change rate of the prime mover is specified as 5% (i.e. 105% rated speed at room load and rated speed at full load). If the speed change rate of the prime mover is less than 5% and there are other provisions, the specified speed change rate shall be used: the no-load voltage of the motor should be close to the rated voltage. 4.9 The generator and its excitation system are running at no-load at rated speed and close to rated voltage. A 60% rated current is suddenly added. The power number does not change with a constant impedance three-phase symmetrical load of 0.4 (after measurement). After stabilization, the load is suddenly added again. The voltage of the motor is adjusted and the voltage changes are restored and maintained at 18 and U The time required (recovery time) should not exceed the time specified in Table 6. The voltage characteristic level of each system motor should be specified in the enterprise standard. Table 6 Transient voltage characteristics of the vehicle voltage
Standard level
Steady-state voltage regulation vehicle Bgt
Transient voltage
Same adjustment Zhuo%
Maximum code voltage drop d
Measurement of voltage rise: + surface
Change health three aspects,
Recommendation: AMP-by the user and the seal manufacturing consultation
Standard voltage regulation rate according to formula (4) and formula (5) Calculation: By
Formula JB/T8981: min-UN - maximum peak voltage after sudden load unloading, calculated according to the three-phase average value, V. JB/T8981: min-UN - minimum peak voltage after sudden load unloading, calculated according to the three-phase average value, V. UN - rated voltage value, V. 4.1 Under rated working conditions, the voltage change from cold to hot state of the motor (cold and hot state voltage change) should not be greater than 5% of the rated voltage for generators using different controlled excitation systems; it should not be greater than 2% of the rated voltage for generators using controllable excitation system. 4.11 When the generator is at no-load and at a constant voltage, add a three-phase symmetrical load of 25% of the rated power (power factor is 0.8 (needed to be added later), and then add a 25% rated phase power of the rated load to any phase: At this time, the difference between the maximum value (or minimum value) of the generator line voltage and the average value of the three-phase line voltage should not exceed 5% of the three-line voltage average value. 4.12 The sinusoidal variation rate of the no-load voltage waveform of the generator should not exceed the following values: 5% for rated power of 250kW and above:
10% for rated power below 250kW
4.13 For generators of 250kW and above connected to the power grid, in order to reduce the interference between the transmission line and the adjacent feedback, the telephone harmonic factor (THF) of the line voltage should not exceed 5%
414 The efficiency of the generator with Class B insulation (m index meets the order Table 7 stipulates: The efficiency index of the F-class insulation generator is stipulated by the enterprise standard
The generator efficiency book is determined by the consumption analysis method. Table B Efficiency Index of Class Insulation Generator
Rated speed
Rated rotation speed
3203001
16(1s)
90184)
120135)
150(160)
The insulation grade of the generator is Class A, Class F. When the sea temperature and ambient temperature meet the requirements of Article 4.2, the temperature rise limit of each winding of the generator shall not exceed the provisions of Table 8
JB/T89811999
Regardless of the structural parts (except bearings) in contact with the core and the winding, the leakage rise or temperature shall not damage the component itself or any insulation of its associated parts. Collector ring. The temperature rise or temperature of the brush or brush mechanism shall not exceed the current rise or temperature value that the brush grade and collector ring material component can withstand within the operating range. Table 8 Temperature rise limits for air-indirect cooling windings Serial number Measurement method Output side 200kW or less AC power treatment for generators less than 500kW Output side 200kW or less Transformer for generators with an output of 200kW or less (limited to 400kW) Use direct current test group for synchronous generators Temperature rise of the GE/TT5S current setting 2 For 200kW and below generator transformers, if the superposition method is used, the temperature protection The comparative resistance method is 5K as high as the Huimen meter method: Good electrical delivery: EID inspection store 4.16 The humidity of rolling bearings should not exceed 95%. The bearing temperature measuring point should be as close as possible to one of the two positions listed in Table 9. The measuring point is located inside the bearing room, not more than 10m away from the bearing exterior. It is located on the outdoor surface of the bearing room and may be close to the shaft exterior. The quality difference between points A and B can be ignored. For bearings with similar characteristics, the difference between points A and B is about 15K. 4.17 Generators with parallel technology should be able to run stably in parallel: for each generator running in parallel, the ratio of its maximum power to its minimum power should not exceed 3. When the load changes within the range of 20%~100% of the total rated power, the difference between the reactive power load actually borne by each generator and the reactive power distribution calculated according to the rated proportion of each generator for the total reactive load should not exceed 10% of the rated reactive power of the largest generator and 25% of the rated reactive power of the smallest generator. For generators with uncontrollable phase-interrupting magnetic field that require parallel connection, generators of the same model and specification should be able to run in parallel, and their reactive power distribution difference should not be greater than +10% of the rated reactive power of the generator. 4.1 Generators and Its magnetic system can be overloaded by 10% for 16 hours under hot installation without damage or deformation. At this time, the generator strength is not evaluated. The generator and its inductive fibers should be able to withstand a natural overcurrent of 1.5 times the rated current in the hot state for 305 seconds without damage or harmful deformation. At this time, the terminal voltage should be maintained at the rated value of 420 as much as possible. When the generator is remotely operated at the predetermined voltage and the phases are connected at the same time, the peak value of the sudden circuit voltage should not exceed the peak value of the rated current. 15 times or 21 times of the specified value. The peak value of the generator's short-circuit current can be obtained by calculation or by testing at 50% of the rated voltage or high voltage.
4.21 When the protection system has requirements, under the condition of steady-state short circuit, the generator and excitation system should ensure that they maintain not less than 3 times the rated current for 28 times.
4.2 The three-phase short-circuit mechanical strength test of the generator shall be carried out only when the customer clearly states the requirements when ordering. Unless otherwise specified, the test shall be carried out at the rated voltage of the generator under no-load condition. No product shall be produced after 3 tests. 4. The generator can withstand 1.2 times the rated rotation for 2 m in air combat without any damage or harmful deformation, and the rotor can withstand the overspeed test. The generator shall only be subject to overspeed test when there is an agreement. 4.24 The insulation resistance of each winding of the generator in the hot state shall not be less than the value obtained by formula (6): R
1000+P
Where: R--the absolute resistance of the generator potential group, MO; U--the standard voltage of the generator system, V:
P- rated power of the generator, kVA.
4.25 The insulation withstand voltage test of each winding of the generator and its dynamic protection device to the ground should be able to withstand the test voltage specified in Table 10 for 1min without voltage breakdown.
4.26 The insulation impulse withstand voltage test of the generator winding should be carried out. The peak value of continuous impulse test voltage of generator with scattered windings shall be in accordance with the provisions of JB/T96152: The peak value of continuous impulse test voltage of generator with assembled components shall be in accordance with the provisions of JB/T5811: The peak value of continuous impulse test voltage of generator with assembled components shall be in accordance with the provisions of JB/T5810 Table 10 Withstand voltage test
Part name
Generator excitation unit and auxiliary unit to casingGenerator frame unit to auxiliary burning unit
Generator excitation burning unit and the part of remote control device related to anti-magnetic burning unit to casing
Test voltage (effective voltage)
1000V+2 times rated voltage, but the maximum value is 1500V1000V+2 times rated voltage+ but the minimum is 1500V10 rated auxiliary magnetic voltage but The measurement is assumed to be 1500V. The part of the excitation device connected to the power frame is 1000V + 2 times the rated voltage between the casing and each phase, but the minimum is 1500V. The quality calibration components and thermal protection components installed in the power assembly are used for the casing.
Virtual equipment
Note: Semiconductor devices and capacitors, signal lights, and electric beaters are not subject to this test. 1500V
Repeating the above tests 1-5 should be avoided as much as possible, but if a new set of equipment is tested, each component of which has passed the withstand voltage test in advance, then the test voltage should be 80% of the lowest test voltage in any group of the set of equipment
4.27 The electrical barrier and creepage distance in the wiring panel shall not be less than the provisions of Capacitor 11. The measurement method and requirements shall be in accordance with GB/T14048.! The assumption is that 8
voltage is 380-480
medium city power
【peak value】
JB/T8981
table electrical barriers and minimum distances
electrical barriers
pollution level
is the distance high, the protection
(material group A)
pollution level
pollution level
4.2 The noise limit of the A-weighted sound power level of the generator during steady-state operation shall not exceed the provisions of Table 12. When the user has other requirements, the noise limit shall be determined by the manufacturer and the user through consultation in Table 12. The noise value of the generator A-weighted sound power level is the new value of the noise temperature of the generator W
12. 15, 16# 20
編050
64,7584.90
120135,150,160.200
250,280,300,320,359,400
豫声隆值A）
4. The effective value of the perturbation speed of the motor should not exceed the provisions of Table 13. When the user has other requirements, the dynamic limit value shall be negotiated by the manufacturer and the user
Table 13 Generator vibration speed effective value limit value center commercial mm
Maximum dynamic speed effective construction/s
160-225
For transformers required by relevant networks. Its electrical resistance limit is in accordance with the provisions of Table 14 Table 14 Electromagnetic immunity limit
Electromagnetic heating
Radiated interference
Conducted interference
Frequency range MHz
30-230
230-1000
250-400
30V/m quasi-peak value, measured at a distance of 30m 37dBμV/m quasi-peak value, measured at a distance of 30m R-dimensional peak value
66 flat ground
quasi-peak path
Unless otherwise specified: start from the axis extension , the rotation direction of the generator is clockwise: at this time, the letter sequence of the output terminal mark should be consistent with the terminal voltage phase sequence
JB/T89811999
4.32 The motor should have a reliable grounding device and be marked with the connection symbol or graphic mark specified in GB14711. The design of the grounding device should comply with the provisions of GB/T753. When grounding with a grounding bolt, the minimum diameter of the grounding bolt should comply with the provisions of GB14711, and sufficient mechanical strength should be considered. The connection bolt should be resistant to electrical corrosion and be a good conductor of electricity. If black metal is used, it should be electroplated or other colored metal should be used to prevent casting. 4. Consider the factors that may affect the shaft system torque after the generator and internal combustion engine are combined: when necessary, the generator manufacturer should provide the generator rotor size and rotation torque and other data to the internal combustion engine manufacturer, and the internal combustion engine manufacturer will calculate and determine 4.34. The tolerance of the motor parameter values ​​shall be in accordance with the provisions of Table 15. Table 15 The tolerance of the generator parameter values ​​
5 Test Test method
Motors of 50W and below
Motors of 50kW and above
Real ground current peak signal
#Jiying ground current characteristic (other dynamic stability Jichao ground characteristic)-159401-1
±30% of the certified value
Full 15% of the guaranteed value
This standard specifies the test method for generators. If no specific test method is specified, it shall be carried out in accordance with the provisions of GB/T1029. 5.1 Shell anti-slap form performance test shall be carried out in accordance with the provisions of GB/T4942.1 5.240T alternating strong heat test shall be carried out in accordance with the provisions of GB/T12665 ​​53 Generator mechanical inspection includes:
Inspection: When the generator is running, the bearings should be stable and light, without stagnation: b) Surface quality inspection: The paint on the surface of the generator should be dry and complete, without rotation, can ring, plastic, etc., and the generator assembly is correct
e) Installation dimension and external dimension inspection; according to the provisions of GB/T4772.1. 5.4 Inter-turn impact withstand voltage test shall be carried out in accordance with the provisions of JB/T9615.1 or JB/T5810 or JB/T5811 5.5 Perturbation measurement shall be carried out in accordance with the assumptions of GB10068 5.6 Noise measurement shall be carried out in accordance with the provisions of GB10069 5.7 Electromagnetic relay measurement shall be carried out in accordance with the provisions of GB4824. 5.8 Determination of steady-state voltage regulation rate. The steady-state voltage regulation rate of the generator should be determined in cold or hot state. The power factor is 0.8. The generator is empty at the beginning of the test and the setting value is set. The voltage setting device needs to be adjusted to make the voltage close to the rated voltage (not exceeding the specified range of steady-state voltage regulation rate). During the test, the voltage setting device is not allowed to be adjusted again. The power factor remains unchanged. The three-phase symmetrical load increases from zero to the rated power, and then decreases from the rated power to zero. Measure the voltage at each point. The load change at each point is 25% of the rated power. During the inspection test, the measurement point can be reduced. The steady-state voltage regulation rate in hot state should be carried out immediately after the temperature rise test, and the voltage can be readjusted.! Assuming that the voltage is 80-480V, the maximum value of the electrical barrier and the minimum distance between the power supply and the power supply is shown in JB/T8981. The minimum distance between the power supply and the power supply is shown in Table 12. The noise limit of the A-weighted sound power level of the generator in steady-state operation should not exceed the provisions of Table 12. When the user has other requirements, the noise limit shall be determined by the manufacturer and the user. Table 12 Generator A-weighted sound power level noise temperature value new conversion main power car W 12. 15, 16# 20
編050
64,7584.90
120135,150,160.200
250,280,300,320,359,400
豫声隆值A）
4. The effective value of the perturbation speed of the motor should not exceed the provisions of Table 13. When the user has other requirements, the dynamic limit value shall be negotiated by the manufacturer and the user
Table 13 Generator vibration speed effective value limit value center commercial mm
Maximum dynamic speed effective construction/s
160-225
For transformers required by relevant networks. Its electrical resistance limit is in accordance with the provisions of Table 14 Table 14 Electromagnetic immunity limit
Electromagnetic heating
Radiated interference
Conducted interference
Frequency range MHz
30-230
230-1000
250-400
30V/m quasi-peak value, measured at a distance of 30m 37dBμV/m quasi-peak value, measured at a distance of 30m R-dimensional peak value
66 flat ground
quasi-peak path
Unless otherwise specified: start from the axis extension , the rotation direction of the generator is clockwise: at this time, the letter sequence of the output terminal mark should be consistent with the terminal voltage phase sequence
JB/T89811999
4.32 The motor should have a reliable grounding device and be marked with the connection symbol or graphic mark specified in GB14711. The design of the grounding device should comply with the provisions of GB/T753. When grounding with a grounding bolt, the minimum diameter of the grounding bolt should comply with the provisions of GB14711, and sufficient mechanical strength should be considered. The connection bolt should be resistant to electrical corrosion and be a good conductor of electricity. If black metal is used, it should be electroplated or other colored metal should be used to prevent casting. 4. Consider the factors that may affect the shaft system torque after the generator and internal combustion engine are combined: when necessary, the generator manufacturer should provide the generator rotor size and rotation torque and other data to the internal combustion engine manufacturer, and the internal combustion engine manufacturer will calculate and determine 4.34. The tolerance of the motor parameter values ​​shall be in accordance with the provisions of Table 15. Table 15 The tolerance of the generator parameter values ​​
5 Test Test method
Motors of 50W and below
Motors of 50kW and above
Real ground current peak signal
#Jiying ground current characteristic (other dynamic stability Jichao ground characteristic)-159401-1
±30% of the certified value
Full 15% of the guaranteed value
This standard specifies the test method for generators. If no specific test method is specified, it shall be carried out in accordance with the provisions of GB/T1029. 5.1 Shell anti-slap form performance test shall be carried out in accordance with the provisions of GB/T4942.1 5.240T alternating strong heat test shall be carried out in accordance with the provisions of GB/T12665 ​​53 Generator mechanical inspection includes:
Inspection: When the generator is running, the bearings should be stable and light, without stagnation: b) Surface quality inspection: The paint on the surface of the generator should be dry and complete, without rotation, can ring, plastic, etc., and the generator assembly is correct
e) Installation dimension and external dimension inspection; according to the provisions of GB/T4772.1. 5.4 Inter-turn impact withstand voltage test shall be carried out in accordance with the provisions of JB/T9615.1 or JB/T5810 or JB/T5811 5.5 Perturbation measurement shall be carried out in accordance with the assumptions of GB10068 5.6 Noise measurement shall be carried out in accordance with the provisions of GB10069 5.7 Electromagnetic relay measurement shall be carried out in accordance with the provisions of GB4824. 5.8 Determination of steady-state voltage regulation rate. The steady-state voltage regulation rate of the generator should be determined in cold or hot state. The power factor is 0.8. The generator is empty at the beginning of the test and the setting value is set. The voltage setting device needs to be adjusted to make the voltage close to the rated voltage (not exceeding the specified range of steady-state voltage regulation rate). During the test, the voltage setting device is not allowed to be adjusted again. The power factor remains unchanged. The three-phase symmetrical load increases from zero to the rated power, and then decreases from the rated power to zero. Measure the voltage at each point. The load change at each point is 25% of the rated power. During the inspection test, the measurement point can be reduced. The steady-state voltage regulation rate in hot state should be carried out immediately after the temperature rise test, and the voltage can be readjusted.! Assuming that the voltage is 80-480V, the maximum value of the electrical barrier and the minimum distance between the power supply and the power supply is shown in JB/T8981. The minimum distance between the power supply and the power supply is shown in Table 12. The noise limit of the A-weighted sound power level of the generator in steady-state operation should not exceed the provisions of Table 12. When the user has other requirements, the noise limit shall be determined by the manufacturer and the user. Table 12 Generator A-weighted sound power level noise temperature value new conversion main power car W 12. 15, 16# 20
編050
64,7584.90
120135,150,160.200
250,280,300,320,359,400
豫声隆值A）
4. The effective value of the perturbation speed of the motor should not exceed the provisions of Table 13. When the user has other requirements, the dynamic limit value shall be negotiated by the manufacturer and the user
Table 13 Generator vibration speed effective value limit value center commercial mm
Maximum dynamic speed effective construction/s
160-225
For transformers required by relevant networks. Its electrical resistance limit is in accordance with the provisions of Table 14 Table 14 Electromagnetic immunity limit
Electromagnetic heating
Radiated interference
Conducted interference
Frequency range MHz
30-230
230-1000
250-400
30V/m quasi-peak value, measured at a distance of 30m 37dBμV/m quasi-peak value, measured at a distance of 30m R-dimensional peak value
66 flat ground
quasi-peak path
Unless otherwise specified: start from the axis extension , the rotation direction of the generator is clockwise: at this time, the letter sequence of the output terminal mark should be consistent with the terminal voltage phase sequence
JB/T89811999
4.32 The motor should have a reliable grounding device and be marked with the connection symbol or graphic mark specified in GB14711. The design of the grounding device should comply with the provisions of GB/T753. When grounding with a grounding bolt, the minimum diameter of the grounding bolt should comply with the provisions of GB14711, and sufficient mechanical strength should be considered. The connection bolt should be resistant to electrical corrosion and be a good conductor of electricity. If black metal is used, it should be electroplated or other colored metal should be used to prevent casting. 4. Consider the factors that may affect the torque of the shaft system after the generator and internal combustion engine are combined: when necessary, the generator manufacturer should provide the internal combustion engine manufacturer with the generator rotor size and rotation torque and other data, and the internal combustion engine manufacturer will calculate and determine 4.34. The tolerance of the motor parameter values ​​shall be in accordance with the provisions of Table 15. Table 15 The tolerance of the generator parameter values ​​
5 Test Test method
Motors of 50W and below
Motors of 50kW and above
Real ground current peak signal
#Jiying ground current characteristic (other dynamic stability Jichao ground characteristic)-159401-1
±30% of the certified value
Full 15% of the guaranteed value
This standard specifies the test method for generators. If no specific test method is specified, it shall be carried out in accordance with the provisions of GB/T1029. 5.1 Shell anti-slap form performance test shall be carried out in accordance with the provisions of GB/T4942.1 5.240T alternating strong heat test shall be carried out in accordance with the provisions of GB/T12665 ​​53 Generator mechanical inspection includes:
Inspection: When the generator is running, the bearings should be stable and light, without stagnation: b) Surface quality inspection: The paint on the surface of the generator should be dry and complete, without rotation, can ring, plastic, etc., and the generator assembly is correct
e) Installation dimension and external plastic dimension inspection; according to the provisions of GB/T4772.1. 5.4 Inter-turn impact withstand voltage test shall be carried out in accordance with the provisions of JB/T9615.1 or JB/T5810 or JB/T5811 5.5 Perturbation measurement shall be carried out in accordance with the assumptions of GB10068 5.6 Noise measurement shall be carried out in accordance with the provisions of GB10069 5.7 Electromagnetic relay measurement shall be carried out in accordance with the provisions of GB4824. 5.8 Determination of steady-state voltage regulation rate. The steady-state voltage regulation rate of the generator should be determined in cold or hot state. The power factor is 0.8. The generator is empty at the beginning of the test and the setting value is set. The voltage setting device needs to be adjusted to make the voltage close to the rated voltage (not exceeding the specified range of steady-state voltage regulation rate). During the test, the voltage setting device is not allowed to be adjusted again. The power factor remains unchanged. The three-phase symmetrical load increases from zero to the rated power, and then decreases from the rated power to zero. Measure the voltage at each point. The load change at each point is 25% of the rated power. During the inspection test, the measurement point can be reduced. The steady-state voltage regulation rate in hot state should be carried out immediately after the temperature rise test, and the voltage can be readjusted.1 or JB/T5810 or JB/T5811 5.5 Perturbation measurement shall be carried out in accordance with GB10068 5.6 Noise measurement shall be carried out in accordance with GB10069 5.7 Electromagnetic transmission measurement shall be carried out in accordance with GB4824. 5.8 Determination of steady-state voltage regulation rate: The steady-state voltage regulation rate of the generator shall be carried out in cold or hot state, and the power factor is 0.8. The generator is empty at the beginning of the test, and the setting value is set to a fixed value. The voltage setting device needs to be adjusted to make the voltage close to the rated voltage (not exceeding the range of the specified steady-state voltage regulation rate). During the test, the voltage setting device is not allowed to be adjusted again, and the power factor remains unchanged. The three-phase symmetrical load increases from zero to the rated power, and then decreases from the rated power to zero. Measure the voltage at each point. The load change at the point of measurement is 25% of the rated power. During the inspection test, the steady-state voltage regulation rate under hot conditions should be reduced. The temperature rise test should be carried out immediately after the temperature rise test, allowing the voltage to be readjusted.1 or JB/T5810 or JB/T5811 5.5 Perturbation measurement shall be carried out in accordance with GB10068 5.6 Noise measurement shall be carried out in accordance with GB10069 5.7 Electromagnetic transmission measurement shall be carried out in accordance with GB4824. 5.8 Determination of steady-state voltage regulation rate: The steady-state voltage regulation rate of the generator shall be carried out in cold or hot state, and the power factor is 0.8. The generator is empty at the beginning of the test, and the setting value is set to a fixed value. The voltage setting device needs to be adjusted to make the voltage close to the rated voltage (not exceeding the range of the specified steady-state voltage regulation rate). During the test, the voltage setting device is not allowed to be adjusted again, and the power factor remains unchanged. The three-phase symmetrical load increases from zero to the rated power, and then decreases from the rated power to zero. Measure the voltage at each point. The load change at the point of the test is 25% of the rated power. During the inspection test, the steady-state voltage regulation rate under hot conditions should be reduced. The test should be carried out immediately after the temperature rise test, allowing the voltage to be readjusted.
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